I'm at the heavy weeks of ROP and my left shoulder is a bit tired. Last light day I didnt do the negative press. I dropped the bell from overhead to the rack catching it with a dip.
Concentric Only Training
This is an effective training method that elicits a different training effect, dependent on your objective.
Concentric only training is primarily involve in the Deadlift, Olympic Movements (Olympic Pulls, Jerks, Snatches, and Push Press), the Kettlebell Swing, etc.
With all of these movement, it hard or impossible to slowly lower them; perform a slow Eccentric Action.
Greater Recovery From Concentric Only
As we know, the greatest amount of muscle damage/trauma is produce with an Eccentric Action. Eccentrics are noted as the main reason for Delayed Onset of Muscle Soreness.
Thus, by eliminating or minimizing the Eccentric part of a movement, you recover faster from training.
The elimination of the Eccentric Action in an Olympic Movement is one of the reason that it appear Olympic Lifter can train heavy with greater frequency.
Dr Fred Hatfield Concentric Squat Training
Some of his Squat Training revolved around Squatting a weight off pins in a Power Rack; then allowing it to drop back on the pins.
While this is an effective training method, it not good for the bar nor the rack.
Biking For Legs
Essentially, the Bike is a One Leg Concentric Only Leg Press. Research has demonstrated that due to their being no Eccentric Component, the legs can be trained harder with greater frequency because they recover faster.
Kenny Croxdale